Note 4 - Debt Securities - Schedule of Available-for-sale Debt Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Amortized cost basis	$ 26,572	$ 27,798
Gross unrealized gains	15	2
Gross unrealized losses	2,053	2,107
Available for sale, allowance	0	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	24,534	25,693
US States and Political Subdivisions Debt Securities [Member]
Amortized cost basis	11,081	11,130
Gross unrealized gains	2	2
Gross unrealized losses	913	581
Available for sale, allowance	0	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	10,170	10,551
Asset-Backed Securities [Member]
Amortized cost basis	7,560	7,961
Gross unrealized gains	13	0
Gross unrealized losses	560	745
Available for sale, allowance	0	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	7,013	7,216
Mortgage-Backed Security, Issued by US Government-Sponsored Enterprise [Member]
Amortized cost basis	7,931	8,707
Gross unrealized gains	0	0
Gross unrealized losses	580	781
Available for sale, allowance	0	0
Debt Securities, Available-for-Sale, Excluding Accrued Interest	$ 7,351	$ 7,926

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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- Definition

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481800/320-10-50-2

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Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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Amortized cost excluding accrued interest, before allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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